Question

The big-Omega notation for f(x) = 2x^4 + x^2 – 4 is?

(a) x^2

(b) x^3

(c) x

(d) x^4

I had been asked this question in an international level competition.

I need to ask this question from The Growth of Functions in chapter Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics

Answer 1

Correct answer is (d) x^4

To elaborate: 2x^4 + x^2 – 4 is greater than or equal to x^4.